Ellipsograph



March 8, 1932.

Filed May 14, 1929 I N VEN TOR.

A TTORNE Y.

Patented Mar. 8, 1932 i UNITED fsrATss Y 1,848,953,Vv Y

PATENTfoFFI CEiA,f l

wiLLIAM H. Hurry or WICHITA, KANSAS Y ELLIPSOGRAPH- applicati@ filed may 14. 1929. serial-no. 363,007.

One of the important objects of the presenti-nvention is to provide-an ellipsograph' wherein means is provided for mechanically l vcontrolling the path of movement of am-a'rking member for producing anellipse or oval.

with one continuous turn of the instrument.

A further object is to provideanv 'ellipse--y graph of ,the above-mentioned character 'wherein the same includes adjustablyconnected members, said members being opera--r` tively connectedtogether for rotation' re gardless of their angularly disposed relation lwith respect to each other. f r

A further object is to provide an vellipsegraph of the above-mentioned 'character which 'is simple 1n construction, inexpensive',-

strong and durable and further well adapted for the purposes for which it is designed. Other objects and advantages ofthe inven# 0 tion will become apparent from the following descriptionY when taken in connectio11` with the accompanying drawings.

. In the accompanying drawings, wherein like reference characters indicate correspond ingparts throughout the same;

*lgure 17's a view partly in elevation and partly in section of the ellipsograph embody-- ing my invention.

Figure 2 is a side elevation of the handlel portion of the instrument.

Figure 3 is a View similar to Figure 2'lookf y n Y @a vpencil or pen for producing an ellipse and Y ing at right angl-es thereto.

Figure 4 is adetail sectionaljviewtaken 'approximately on the line 4L-4 ofFigure l.' Figure 5 is a similar section taken on the line V5 5 of Figure Y .Y n Figure 6 is afragmentary edge elevation of the base showing the gear casing mounted thereon and the connection between the gear casing and the lower end portion of the adjacent leg-'memben Figure 7 is a perspective view of an exten sion armfor associationwith one of the leg 50 members.

FigureS is a detail perspective view of the pen or pencil carrying unit. Y e VFigure 9 is a fragmentary bottoni plan yview of the base andthe gear casing mounted n I5 thereon. l .n K

Figure l0 is an elevationalview of .the cooperating gear members.

` Figure 11 isa top Vplanview thereof; and Y 'Figure 12 is a diagram illustrating a portion of the ellipse formed-by the userof'my improved ellipsograph.

In the drawings wherein'forthe purpose of A illustration is shownvthe preferred embodi-vA ment ofmy invention, with reference more particularly tothe diagramiillustratedin o5.:

Figure 12, the numerals il and 2 designate one line while the numerals 3 and `6 designate an intersecting line that is disposed at right angles'with respectV to the aforementioned line.

2, the minoraxis having one half thereof denoted by the distance. betweenO and 4.'

With 0L as the center, the line O-'is laidl olf on line 1;-2 equal to the distance between vand form an ellipse whose minor radius is' 0 4 andk whose ma] or radius 1s 0-2.

It is one of the salient objects of the .pres- ,85v

. ent invention to devise an instrument thatl v will mechanically vcontrol the path of either wherein the pencil or'pen' will be` caused to pass .through the point2-'8-10-12-14-i 90 '16-18-4-20, etc., in the manner as de-` scribed above.

I have therefore devised an improved ellip'sograph shown in the accompanyingdraw'- ngs and the description of which will 110W be 9515 paper on which the ellipse is to beformed,` mi* These lines will constitute the '-axesf 70 -upon which the ellipse is to be drawn where# inthe ellipse has a major'l axis one half ofl which is the distance between 0 located atv the lpoint of'intersection between said lines,`and

toward one end and the smaller outei errdf-`l portion of this gear casing has journaled therethrough the vertically disposed 'spindle 29 that projects above thev top of the gear casing. A pinion 30. is secured .onthe lower end portion .of thespindle29 fori-disposition within-the. gear casing andrthis pinion30 2(1-has meshing engagement with the spur:` gear.

27 in the manner as clearlydisclosed in Figure 1. The pinion 30 will revolve aboutits axis as it .iscarried around the spur gear2-?. Formed on the` upper end ofthe spindle Y29 isthefballlshapedfhead 31 (Fig.6) orcooperation withl a socket 32 carried by thelower; end of .a Yshaftr33 that= extends upwardly through: a tubular housing 34 Econstituting` aV f,

part offone of 'theflegmembers othe in.-

,strument denoted .generally byy the r numeral Thedower end 'ofthe tubularmember34 is formedwith afork..36, the furcationsoii4 which -are disposedlon opposite sides of .the`

Yball shaped .sock`et32 and the furcations are pivota-lly connected'to upstanding lugs 37. carried by theouter end portion ,offthe gearv casing, 28.3 The pivotal connectioniabetween theforked -lower end of .the tubular member -34andfth`e upstandingf spaced lugs .37.is indicated at 38 in Figure 6L The leg member 35 also includes an upperT section consisting offen tubular memberv 39 and the adjacent ends of the .tubular members' i 34 and 39 are, formed with .complementary forks 40 and 41 respectively thatiare pivotally connected togetherrin themanneras shown. in Figure 5. The upper endfof'the shaft 33.

is formed with a-,ball shaped head ,42jth`at cooperates with a socket 43 formed on thelower end of the shaft`244 that `rotates withinthe.

tubular uppertsection .39 andfthe. ballanzd, socket connection between the. adjacent ends of the shafts `33 1and44 is also clearly illustrated in Figure 5.

Secured on the upperend ofdtheshaft 144 is the cog denotedby the numeral45and-#the teeth -46` of this cog ,or pinion are. cylindrical and, crowned with hemisphericall caps` off` equalfdiameter, as disclosedmore clearly inr FigureslO: andll, ,the teethuofthe cog-` being f indicated `by the reference. characterr 46. The purpose of this ,particulartypev of7 cog..v

ora pinion construction.v will be hereinafter 'mores-fully@described v The complementary leg member is denoted generally by the numeral 47 and the same includes an upper tubular section 48, the upper ends of the tubular sections 39 and 48 being pivotally and adjustably connected together within a suitable yoke 49 that is of inverted U-shaped formation and Aa knurled handle 50 extends -upwardlyi from `[the:y crown portion of this yoke 'or manipulating the instrument'when in use. A shaft 51 extends througlnthe tubular -member 48 and a cog 52 similar to the cog 45 is carried by the upper endJo-flthe shaft 5l for cooperation with the complementary .cog 45 and by constructing the teeth ofthe cog in the manner as shown and above described, said: cogs will., at .all

times be. in .meshing engagement. with eaelrx other regardless of the. angle at .whichthea shafts 44 'and v,51.are disposedf.

The leg member47 includesy anintermediate section 53 that is also of tubularconstruc--- tion and the, ,upper end .of f the intermedi-ate section A53: is -formed .with afork 54; A-erk 55 is h`formed :on `the lower end Vof the `tubularr section 48 and theforks 54 and 55.are pivotal-` ly connected together as suggestedy more,-

clearlyin-Figureot thedravvings.-`l 'The lower end o/theshaftl is-ormedawit-h za socket 56 to receive the ball' shaped fheadv'5fformed on'the upperrend ofthe short shaft- 58 thatis. jou-rnaledior rotation `within theintermediate tubular sectiony 53. asfalso` shown Very clearly in- :Figure-4i Theelower endof the shaft 58V is formed with a.-slottedfhead 59vv toreceive the upper ,end of the sectie-Ir 60,1said section 60 being pivotallyy connected ltontheflower end Yof the shaft 158.- The lower end Tof f the shaft 60- is formed with. aa fsocket for Arescelvmg a pencil'carry1ng1-u'1i1t L-orfazpen car:` rying unit 62. There=-1s` also .provided lan: ex-

tension section 63 that maybe-interposedeither-between the-pen orfpencil -unit and .the section 60 when desired.

The -use ofi myimproved 'el-lipsograph i is thought to,` :be readily obvious `-ro1n-the-con.- struction and description setout'abo-vef-andz by substituting the reenter: pointrformed by the bolt 26 for 0' on the'. diagram in Figure1l2,' and point 64 formed by the:connectionwbee` tween the; sectionzvGOyand; the :Slotted headf59 for point O in the difagramish'own:incliiigure1 l2, and the point Lof ithepencilorzpieir or point 2 in the diagram, the instrument willlthenV be in proper position-forfformiirgthe desired-'ellipse' withY Aone continuous turn' of fth'einstrue ment and 'the ellipse "formed fwilil be'accurate.

It will .thus be seen from"the:iregoingjde` scription, that IT have providedl an instru'-` proportions, andthe simplicity of 'iny instrument enablestheparts :tobereadily andeasily adjusted. Furthermore anellipsograph of.;

the above mentioned character will;at:all

` tion.

times be positive and eiiicient in its opera- While I have shown tlie preferred embodiment of my invention, it is to be understood that minor changes in the size, shape and arrangement of parts may be resorted to without departing from the spirit of the invention or the scope of the appended claims.,v

' members whereby the saine will rotate simultaneously, and a marking element adjustably connected to the lower end of the other leg member as and for the purpose described, each leg member including tubular sections pivotally connected together at their adjacent ends, a shaft disposed for rotation in each tubular section, and a ball and socket connection between the adjacent ends of the shaft in the adjacent tubular sections.

2. An instrument of the class described comprising in combination, a base, means for securing the same on a drawing against movement, a pivot-forming member extending upwardly from the base, a gear mounted on the pivot-forming'member in a stationary manner, a pinion meshing with the gear'for movement therearound, a casing for the gear and the pinion mounted for pivotal movement on said pivot-forming member, a spindle extending through the gear casing and being xedly connected with the pinion, a leg member operatively connected at its lower end with the projecting end `of the spindle, an additional leg member, means for operatively connecting tlie upper ends of the leg members together, means connected with the upper end portions of the leg members for manually actuating the first-mentioned leg member to move the same around the stationary gear, and a marking member adjustably carried by the lower end of the second mentioned leg member. Y

3. An instrument of the class' described comprising in combination, a base, means for ,A securing the same on aV drawing against movement, a pivot-forming member extending upwardly from the base, a gear mounted on the pivot-forming member in a stationary manner, a pinion meshing with the gear forA operatively connecting the upper ends of the leg members together, means connected with the upper end portions of the leg members for manually actuating the' first-mentioned leg member to move the same around the justably carried by the lower end of the secy ond mentioned leg member, and means for 'maintaining the operatively connected upper ends of the leg members in any predetermined angular relation with respect to each other. l Y f 4. An instrument of the class described comprising in combination, a base, means for securing the same on a drawing against 80 movement, a pivot-forming member extending upwardly from the base, a gear mounted on the pivot-forming member in a stationary manner, a pinion meshing with,the gearfor movement therearound, a casing for the gear ment on said pivot-forming member, a spin- Y dle extending through the gear casing and xedly connected with the pinion, primary and secondary leg members, each leg memberv including sectional tubular members koperatively connected together at their adjacent ends, a shaft extending through each tubular section, the adjacent-ends of the shaft of each leg member being operatively connected together, the lower end of the lowermost shaft ofthe primary leg being operatively connected with the projecting end of the spindle for rotation therewith, intermeshing cogs on the upper ends of the uppermost shafts of said leg members, a handle carrying unit supported by vthe, upper connected portions of the primary and secondary leg members for actuating the gear casing andv to .effect theV rotation of said interconnected, shafts, and a marking member adjustably connected to the lower end of the secondary v leg member.

In testimony whereof I aiiix my signature.,

WILLIAM H. lUFF. 110

iis

izo j stationaryl gear, and a markingmember adand the pinion mounted for pivotal move- 

